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EP1771458B9 - N-phenylphosphoric acid triamides, method for the production thereof and their use as agents for regulating or inhibiting enzymatic urea hydrolysis - Google Patents

N-phenylphosphoric acid triamides, method for the production thereof and their use as agents for regulating or inhibiting enzymatic urea hydrolysis Download PDF

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Publication number
EP1771458B9
EP1771458B9 EP05701353A EP05701353A EP1771458B9 EP 1771458 B9 EP1771458 B9 EP 1771458B9 EP 05701353 A EP05701353 A EP 05701353A EP 05701353 A EP05701353 A EP 05701353A EP 1771458 B9 EP1771458 B9 EP 1771458B9
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EP
European Patent Office
Prior art keywords
nitrophenyl
urea
phosphoric acid
alkyl
urease
Prior art date
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EP05701353A
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German (de)
French (fr)
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EP1771458A1 (en
EP1771458B1 (en
Inventor
André HUCKE
Hans-Joachim Niclas
Hartmut Wozniak
Hans-Jürgen Michel
Carola Schuster
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SKW Stickstoffwerke Piesteritz GmbH
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SKW Stickstoffwerke Piesteritz GmbH
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02Phosphorus compounds
    • C07F9/06Phosphorus compounds without P—C bonds
    • C07F9/22Amides of acids of phosphorus
    • C07F9/224Phosphorus triamides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/04Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/16Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00Drugs for disorders of the urinary system
    • A61P13/02Drugs for disorders of the urinary system of urine or of the urinary tract, e.g. urine acidifiers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00Drugs for disorders of the urinary system
    • A61P13/04Drugs for disorders of the urinary system for urolithiasis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00Drugs for disorders of the urinary system
    • A61P13/12Drugs for disorders of the urinary system of the kidneys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • A61P25/28Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04Antibacterial agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P39/00General protective or antinoxious agents
    • A61P39/02Antidotes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B15/00Organic phosphatic fertilisers
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/90Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Definitions

  • the present invention relates to novel N - (2-nitrophenyl) phosphoric, processes for their preparation, compositions containing them and use of these N - (2-nitrophenyl) phosphoric or compositions containing them (urease) as a means for regulating or inhibiting the enzymatic Urea hydrolysis (also in combination with nitrification inhibitors) to avoid nitrogen losses in the application of urea-based fertilizers and to reduce the ammonia load in animal sheds due to the elimination of urea hydrolysis and as an additive to feed urea as part of animal nutrition, especially of ruminants.
  • the invention further relates to fertilizer compositions containing N- phenylphosphoric triamides and a urea-based fertilizer.
  • Urea is an originally biogenic metabolite, which is split by the enzyme urease into ammonia and carbon dioxide.
  • the reaction is extremely rapid and effective, and is therefore responsible for N losses in the application of urea-based fertilizers. These are particularly high if the soil does not have sufficient sorption power to bind the liberated ammonia in the form of ammonium ions.
  • agriculture loses considerable amounts of nitrogen every year, contributing to environmental pollution and requiring increased fertilizer requirements.
  • urea is the largest N-containing nitrogen fertilizer and the world's most abundant N fertilizer
  • the search for workable solutions to reduce urease-induced N losses becomes understandable.
  • a variety of solutions have been proposed.
  • the acid coating of urea prills or granules in order to be able to absorb ammonia formed by salt formation, or the coating with substances, whereby urea is released slowed down and thus the resulting ammonia can be easily »buffered «.
  • N losses from the urease-catalyzed hydrolysis of urea and nitrification may be up to 50% under unfavorable conditions, especially in tropical and subtropical climates.
  • multi-split fertilizer feeds are recommended as needed, which, however, entail significant labor-management disadvantages and corresponding additional expenses for the farmer as a result of additional application costs.
  • Options for limiting nitrogen losses include the targeted inhibition of urease-catalyzed urea hydrolysis on the one hand and nitrification inhibition on the other.
  • the use of such substances appears promising, which lead to urease inhibition, which in addition to the application for fertilization purposes, of course, the application for minimizing the ammonia load in animal sheds or their addition to feed urea offers.
  • urease inhibitors are an effective way to significantly slow down the enzymatic urea hydrolysis, which is extremely rapid under normal conditions. Due to the delay of this enzyme reaction, the fertilizer urea can penetrate undecomposed into deeper soil layers.
  • NPN compounds non-protein-nitrogen compounds
  • the urea can take on this role if it is possible to control the urease-catalyzed urea hydrolysis taking place in the rumen of the animals in such a way that the released ammonia rates are immediately processed into microbial protein by the presence of microorganisms and consequently can not trigger any toxic effects.
  • suitable urease inhibitors is also suitable here.
  • phosphoric acid ester diamides ( DD 122 177 ) compounds have been found which are extremely effective urease inhibitors.
  • phosphoric triamide including the main body (cf., for example, US Pat. US 4,540,428 . US 4,676,822 . US 4,696,693 . US 4,537,614 . US 4,517,004 . EP 0 119 487 ), of which the N- (n-butyl) thiophosphoric triamide (NBTPT) has been commercialized as the sole representative (IMC AGRICO Corp., product name Agrotain®).
  • NBTPT N- (n-butyl) thiophosphoric triamide
  • NBTPT fails under anaerobic conditions in rice cultivation, ie precisely where the highest nitrogen losses and ammonia emissions are recorded, since the formation of the oxygen analogue of NBTPT and thus of the actual urease inhibitor is not or only slowly possible (cf. Fertilizer Research 42, 251 (1995 )).
  • N losses due to uncontrolled urease-catalyzed hydrolysis of urea nitrogen is lost in the form of nitrate, which is removed by leaching or transfer to deeper soil layers of plant nutrition.
  • these N losses can be increased even if in the course of the rapid nitrification of ammonium ions relatively large amounts of nitrate are formed, which in turn can be converted by incipient denitrification in molecular nitrogen and thus are also no longer available for plant nutrition.
  • nitrification inhibitors for example, substituted pyrazoles ( DD 131 063 . US 3,635,690 ), Triazoles ( DE-OS 18 04 994 . US 3,697,244 . US 3,701,645 ) but also drug combinations based on pyrazole compounds and dicyandiamide ( DD 227 957 ) or of triazole derivatives and dicyandiamide ( WO 95/22 515 ) has been proposed.
  • NBTPT N- (n-butyl) thiophosphoric triamide
  • DCD dicyandiamide
  • US-A-4,242,325 discloses certain phosphoric triamides as urease inhibitors. Among others, a 4-nitrophenyl derivative is indicated.
  • the present invention therefore an object of the invention to provide such urease inhibitors for the practice available when used with fertilizer or other urea-based fertilizers are able to limit the enzyme-catalyzed urea hydrolysis to such an extent that the resulting nitrogen losses in the form of ammonia are almost impossible or the ammonia load in animal houses by spontaneous decomposition of urea is significantly reduced.
  • the new urease inhibitors should be combinable with nitrification inhibitors without any loss of effect in order to achieve a further improvement in N utilization in urea-based fertilizers.
  • these urease inhibitors should slow down the urea cleavage in the rumen of ruminants when using urea as part of animal feeding so that the animals suffer no damage from otherwise taking ammonia intoxications and on the other hand can utilize the thus offered nitrogen for the body's protein biosynthesis.
  • the urease inhibitors can be used for the prophylaxis or therapy of disorders or diseases that are induced or promoted directly or indirectly by urease activity. Examples include catheter encrustation, inflammatory and ulcerative gastric and intestinal diseases, urolithiasis, pyelonephritis, nephrolithiasis, ammonia encephalopathy, hepatic encephalopathy, hepatic coma, urinary tract infections, and gastrointestinal infections. These can be caused for example by urease-producing microorganisms such as Helicobacter pylori.
  • N - (2-nitrophenyl) phosphoric triamides provided and used according to the invention, with suitable substitution on the phenyl radical, are highly effective urease inhibitors with an extremely long-lasting effect.
  • - (2-nitrophenyl) phosphoric also technical problems and cost-effectively from simple starting materials.
  • the N inventive - (2-nitrophenyl) phosphoric come equipped with common Method easily incorporated into urea or urea-based fertilizers, which is an efficient application together with the fertilizer or feeding to ruminants possible. They are both sufficiently water-soluble and well oil-soluble, which was also unpredictable.
  • Another advantage of the invention N - (2-nitrophenyl) phosphoric whose easy combinability with nitrification inhibitors.
  • the invention further relates to methods for the preparation of N invention - (2-nitrophenyl) phosphoric acid triamides as defined in claim 3, compositions containing these n - (2-nitrophenyl) phosphoric acid triamides as defined in claim 3, a fertilizer composition as defined in claim 7 and the uses defined in claims 10 to 16.
  • radicals R 1 -R 4 may optionally be substituted independently and independently of one another by one or more of the abovementioned groups and by amino, alkylamino, dialkylamino, hydroxy, mercapto.
  • Two adjacent radicals R (for example R 1 and R 2 ) may be linked to one another via an alkylene or alkenylene chain to form a 5-6-membered, optionally aromatic ring system which may contain one or more heteroatoms, such as oxygen, Contain nitrogen or sulfur and may be substituted by the above groups.
  • a preferred N- (2-nitrophenyl) phosphoric triamide of the present invention corresponds to the formula (II):
  • the invention includes salts, tautomers and metal complexes of compounds of the general formula (I) or (II) which have urease-inhibiting activity.
  • alkyl, alkenyl or alkynyl groups with the corresponding carbon number mentioned below may be straight-chain or branched and mono- or polyunsaturated.
  • alkyl group "heteroalkyl group” or “cycloalkyl group”, etc. is used occasionally for the sake of simplicity, to avoid unnecessary redundancy, the corresponding unsaturated groups should be included in each case. It will be understood by those skilled in the art that alkenyl or alkynyl groups must have at least 2 carbon atoms and cyclic hydrocarbon groups must have at least 3 carbon atoms.
  • alkyl refers to any combination with any other groups, especially an alkyl group having from 1 to 8 carbon atoms, e.g. a methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, amyl, isoamyl, n-hexyl, 2,2-dimethylbutyl or n-octyl group.
  • alkenyl refers to any combination with any other groups, especially an alkenyl group having from 2 to 8 carbon atoms, e.g. an ethenyl, n-propenyl, isopropenyl, n-butenyl, isobutenyl, tert-butenyl, n-hexenyl, 2,2-dimethylbutenyl, n-octenyl, allyl, isoprenyl or hex-2 enyl group.
  • an alkenyl group having from 2 to 8 carbon atoms e.g. an ethenyl, n-propenyl, isopropenyl, n-butenyl, isobutenyl, tert-butenyl, n-hexenyl, 2,2-dimethylbutenyl, n-octenyl, allyl, isoprenyl or hex-2 enyl group.
  • alkynyl refers to any combination with any other groups, especially an alkynyl group having from 2 to 8 carbon atoms, e.g. an ethynyl, n-propynyl, isopropynyl, n-butynyl, isobutinyl, tert-butynyl, n-hexynyl, 2,2-dimethylbutynyl or n-octynyl group.
  • heteroalkyl refers with respect to the alkyl part to an alkyl group as defined above, but should also include a corresponding heteroalkenyl or heteroalkynyl group in which one or more carbon atoms by at least one oxygen, nitrogen, phosphorus or Sulfur atom are replaced.
  • aryl refers to an aromatic cyclic group having one or more rings and is formed by a skeleton containing 6 to 10 ring carbon atoms. Of course, in the case of several rings, one or more rings may be completely or partially hydrogenated (an example being the 1,2,3,4-tetrahydro-naphthalen-1-yl group).
  • an aryl group may be substituted by alkyl or heteroalkyl groups (each as defined above). Examples are a phenyl, naphthyl, indene, 2-, 3- or 4-methoxyphenyl, 2-, 3- or 4-ethoxyphenyl, 4-carboxyphenylalkyl or 4-hydroxyphenyl group.
  • aralkyl or “heteroarylalkyl” refer to groups which according to the above or following definitions are both aryl or heteroaryl (defined below) as well as alkyl and / or heteroalkyl (also the corresponding alkylene / Heteroalkylene and alkynyl / heteroalkynyl groups) and / or carbocyclic groups (defined below) and / or heterocycloalkyl ring systems (defined below), eg a tetrahydroisoquinolinyl, benzyl, 2- or 3-ethyl-indolyl or 4-methylpyridino group.
  • aralkyl and “heteroarylalkyl” are also intended to include the terms “alkaryl” and “alkheteroaryl” to avoid unnecessary redundancy.
  • cycloalkyl or “carbocyclic” refers to a saturated or partially unsaturated, cyclic, optionally branched, group having one or more rings forming a skeleton containing from 3 to 8 carbon atoms, e.g. a cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, tetralin, cyclopentenyl or cyclohex-2-enyl group.
  • heterocycloalkyl refers to the above-defined cycloalkyl or carbocyclic groups in which one or more carbon atoms are replaced by one or more oxygen, nitrogen, phosphorus or sulfur atoms. Specific examples are aziridine, furan, pyrrolidine, piperidine, morpholine, oxazolidine, thiazolidine, N-methylpiperazino or N-phenylpiperazine groups.
  • heteroaryl refers to an aryl group of 5 to 10 ring atoms in which one or more carbon atoms are replaced by an oxygen, nitrogen, phosphorus or sulfur atom.
  • examples are pyrrole, furan, thiophene, pyrazole, isoxazole, isothiazole, imidazole, oxazole, thiazole, 1,2,4-triazole, 1,2,4-oxadiazole, 1,2 , 4-thiadiazole, 1,3,4-oxadiazole, 1,3,4-thiadiazole, 1,2,5-oxadiazole, 1,2,5-thiadiazole, tetrazole, pyridine, pyridazine, pyrimidine , Pyrazine, 1,2,3-triazine, 1,2,4-triazine, 1,3,5-triazine and indole groups.
  • the N invention - (2-nitrophenyl) phosphoric or compositions containing the same have with appropriate substitution on the phenyl radical excellent for practical purposes inhibitory effect on, whereby they can slow down or the enzymatic urea hydrolysis so temporarily turn that ammonia losses under fertilizer treatments using organic and / or mineral urea-containing nitrogen fertilizer are reduced to a minimum or the occurrence of harmful or troublesome ammonia concentrations in animal husbandry is excluded, for example by urea degradation in animal excreta or by the degradation of feed urea in the rumen as part of the ruminant diet.
  • N inventive - (2-nitrophenyl) phosphoric or compositions containing them extends or fertilizer treatments or preventive measures to avoid high concentrations of ammonia in livestock barns but is used for the use of feed urea within the framework of ruminant nutrition.
  • the compounds according to the invention are preferably applied together with urea-based fertilizers, preferably in an amount of 0.001 to 10% by weight, based on the weight of the urea-based fertilizer, or added to the feed urea or animal waste arising in animal stalls. It is immaterial, for example, in the context of fertilization measures, whether they are superficially previously applied to the fertilizer, incorporated therein or applied together or in a reasonable time separately from urea-containing fertilizers.
  • compositions containing the inventively used N - (2-nitrophenyl) phosphoric triamides and a urea-based mineral and / or organic fertilizer are thus compositions containing the inventively used N - (2-nitrophenyl) phosphoric triamides and a urea-based mineral and / or organic fertilizer.
  • the compounds suitable according to the invention can be used in various ways and applied or applied.
  • the compounds of the invention may be incorporated into the urea or urea-containing fertilizers prior to or during granulation from the molten phase. Furthermore, they can be applied to the surface of the urea or fertilizer granules or added to liquid urea-containing fertilizers. Finally, it is possible to add the urease inhibitors to organic urea-containing fertilizers, such as manure or manure. In addition, the compounds according to the invention can also be applied separately in the field in addition to the application of urea-based fertilizers in a preceding or subsequent work step.
  • the compounds according to the invention can be used in pure form as pulverfömiger substance, granules or melt, aqueous solution or as a special formulation, mixed with the usual and known in the art auxiliaries, carriers and extenders or a combination of these agents. It is irrelevant whether the active ingredient in liquid form as z.
  • Wettable powders, emulsifiable concentrates and suspension concentrates usually, but not necessarily, contain surfactants, e.g. As a wetting, dispersing, emulsifying or suspending agent.
  • surfactants e.g. As a wetting, dispersing, emulsifying or suspending agent.
  • the respective formulation methods correspond to the prior art and are known to the person skilled in the art.
  • the compounds, compositions and fertilizers according to the invention can be used, for example, in and for fertigation.
  • fertigation is meant the targeted supply of nutrients with the irrigation water, which can be applied eg by drip irrigation, spraying or sprinkling.
  • the plants receive only the amount of water required for optimal growth so that no excess water is produced. Lack of vertical water movement in the soil beneath the rooting zone virtually eliminates nutrient leaching losses.
  • Drip irrigation, spraying or sprinkling with urease inhibitors can be done, for example, after fertilization or together with the fertilizer.
  • aqueous solutions or other formulations for example, sprayable suspensions of fine particles can also be used. Insofar let's be an example EP 1 378 499 and WO2004 / 013253 directed.
  • the remaining oil is taken up without further purification in 50 ml of chloroform and added dropwise with exclusion of moisture at -50 to -30 ° C with stirring to a solution of about 30 ml of liquid ammonia in 50 ml of chloroform. Subsequently, the excess ammonia is allowed to evaporate overnight at room temperature.
  • the ammonium chloride-containing crude product is filtered off with suction and, to remove the ammonium chloride, either boiled with diethylamine in chloroform or washed with a little water.
  • ammonium chloride-containing crude product is filtered off with suction and, to remove the ammonium chloride, either boiled with diethylamine in chloroform or washed with a little water. This gives 9.1 g (49%) of N - (3-methylphenyl) phosphoric triamide.
  • the percentage inhibition of the urea hydrolysis is calculated as a function of time or calculated from these values of the t 50 value.
  • the t 50 value is the time in days after the start of the experiment at which the inhibition of urea hydrolysis is still 50%.
  • Table 1 gives an overview of the inhibition data of some selected compounds of the invention determined by this method.
  • Table 1 Urease inhibition (t ⁇ sub> 50 ⁇ / sub> value) after days by ⁇ i> N - ⁇ / i> phenylphosphoric triamides of the general formula (I) Connection no. Conc. A) % HS-N-mar.

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Abstract

The invention relates to N-phenylphosphoric acid triamides of general formula (I) to a method for the production thereof and to their use as agents for regulating or inhibiting enzymatic urea hydrolysis. In formula (I), X represents oxygen or sulfur; R1, R2, R3, R4, R5, independent of one another, represent hydrogen C1-C8 alkyl/heteroalkyl, C2-C8 alkenyl/heteroalkenyl, C2-C8—alkynyl/heteroalkynyl, C3-C8 cycloalkyl/heterocycloalkyl, C3-C8 cycloalkenyl/heterocycloalkenyl, C6-C10 aryl/C5-C10 heteroaryl, aralkyl, heteroarylalkyl, alkaryl, alkheteroaryl, alkoxy, aryloxy, hetaryloxy, alkylthio, arylthio, hetarylthio, acyl, aroyl, hetaroyl, acyloxy, aroyloxy, hetaroyloxy, alkoxycarbonyl, aryloxycarbonyl, hetaryloxycarbonyl, alkylsulfonyl, fluorine, chlorine, bromine, iodine, cyano, nitro, sulfo, carbonyl, carboxy, carbamoyl, sulfamoyl, with the provision that: at least one radical R is not hydrogen; in the event R1, R2, R4, R5 represent H, R3 is not nitro or cyano, and; in the event R1 represents Cl or R1 and R3 represent Cl, at least one of the remaining radicals is not hydrogen.

Description

Die vorliegende Erfindung betrifft neue N-(2-Nitrophenyl)phosphorsäuretriamide, Verfahren zu ihrer Herstellung, diese enthaltende Zusammensetzungen und die Verwendung dieser N-(2-Nitrophenyl)phosphorsäuretriamide oder diese enthaltenden Zusammensetzungen als Mittel zur Regulierung bzw. Hemmung der enzymatischen (ureasekatalysierten) Harnstoff-Hydrolyse (auch in Kombination mit Mitteln zur Einschränkung der Nitrifikation) zur Vermeidung von Stickstoffverlusten bei der Anwendung harnstoffbasierter Düngemittel, sowie zur Reduzierung der Ammoniakbelastung in Tierställen infolge einer weitestgehenden Ausschaltung der Harnstoff-Hydrolyse und als Zusatz zu Futterharnstoff im Rahmen der Tierernährung, speziell von Wiederkäuern. Die Erfindung betrifft weiterhin Düngemittelzusammensetzungen, welche N-Phenylphosphorsäuretriamide und ein harnstoffbasiertes Düngemittel enthalten.The present invention relates to novel N - (2-nitrophenyl) phosphoric, processes for their preparation, compositions containing them and use of these N - (2-nitrophenyl) phosphoric or compositions containing them (urease) as a means for regulating or inhibiting the enzymatic Urea hydrolysis (also in combination with nitrification inhibitors) to avoid nitrogen losses in the application of urea-based fertilizers and to reduce the ammonia load in animal sheds due to the elimination of urea hydrolysis and as an additive to feed urea as part of animal nutrition, especially of ruminants. The invention further relates to fertilizer compositions containing N- phenylphosphoric triamides and a urea-based fertilizer.

Harnstoff ist ein ursprünglich biogenes Stoffwechselprodukt, das durch das Enzym Urease in Ammoniak und Kohlendioxid gespalten wird. Die Reaktion verläuft außerordentlich schnell und effektiv und ist somit für N-Verluste bei der Anwendung von harnstoffbasierten Düngemitteln verantwortlich. Diese sind besonders hoch, wenn der Boden nicht über eine ausreichende Sorptionskraft verfügt, um das frei gewordene Ammoniak in Form von Ammoniumionen zu binden. Dadurch gehen der Landwirtschaft jährlich beträchtliche Mengen an Stickstoff verloren, die auf diese Weise zur Umweltbelastung beitragen und andererseits einen erhöhten Düngemittelbedarf erfordern.Urea is an originally biogenic metabolite, which is split by the enzyme urease into ammonia and carbon dioxide. The reaction is extremely rapid and effective, and is therefore responsible for N losses in the application of urea-based fertilizers. These are particularly high if the soil does not have sufficient sorption power to bind the liberated ammonia in the form of ammonium ions. As a result, agriculture loses considerable amounts of nitrogen every year, contributing to environmental pollution and requiring increased fertilizer requirements.

Darüber hinaus können unter ungünstigen Klimabedingungen und/oder bei Ausbringung auf leichte Böden spontan hohe Ammoniakkonzentrationen im Boden auftreten, die dann zusätzlich die Keimung und das Auflaufen der Jungpflanzen negativ beeinträchtigen.In addition, under unfavorable climatic conditions and / or when applied to light soils spontaneously high concentrations of ammonia in the soil can occur, which then negatively affect the germination and emergence of young plants.

Da Harnstoff das Stickstoffdüngemittel mit dem prozentual größten N-Gehalt und der weltweit mit Abstand dominierende N-Dünger ist, wird die Suche nach praktikablen Lösungen zur Reduzierung der ureasebedingten N-Verluste verständlich. Um dieses Ziel zu erreichen, ist eine Vielzahl von Lösungen vorgeschlagen worden. Zu nennen sind in diesem Zusammenhang die saure Umhüllung von Harnstoffprills oder -granalien, um auf diese Weise entstehenden Ammoniak durch Salzbildung abfangen zu können oder das Coating mit Substanzen, wodurch Harnstoff verlangsamt freigesetzt wird und somit das entstehende Ammoniak problemlos »abgepuffert« werden kann.Since urea is the largest N-containing nitrogen fertilizer and the world's most abundant N fertilizer, the search for workable solutions to reduce urease-induced N losses becomes understandable. To achieve this goal, a variety of solutions have been proposed. In this context, the acid coating of urea prills or granules, in order to be able to absorb ammonia formed by salt formation, or the coating with substances, whereby urea is released slowed down and thus the resulting ammonia can be easily »buffered«.

Außerdem verursacht die ureasekatalysierte Harnstoff-Hydrolyse durch Spaltung des in Kot und vor allem in Harn befindlichen Harnstoffs in Tierställen zum Teil erhebliche Ammoniaklasten, die - abgesehen von einer Geruchsbelästigung bei entsprechend hoher Konzentration - die Entwicklung und das Wachstum der Tiere negativ beeinflussen.In addition, the urease-catalyzed urea hydrolysis caused by cleavage of urea present in faeces and especially in urine in animal sheds sometimes considerable ammonia loads, which - apart from an odor nuisance at a correspondingly high concentration - adversely affect the development and growth of the animals.

Die N-Verluste aus der ureasekatalysierten Hydrolyse des Harnstoffs und der Nitrifikation können unter ungünstigen Bedingungen, besonders in tropischen und subtropischen Klimaten, bis zu 50 % betragen. Um dieses Verlustpotenzial zu minimieren, werden bedarfsgerecht mehrfach geteilte Düngergaben empfohlen, die jedoch für den Landwirt infolge zusätzlicher Applikationskosten mit erheblichen arbeitswirtschaftlichen Nachteilen und entsprechenden Mehraufwendungen verbunden sind.The N losses from the urease-catalyzed hydrolysis of urea and nitrification may be up to 50% under unfavorable conditions, especially in tropical and subtropical climates. In order to minimize this loss potential, multi-split fertilizer feeds are recommended as needed, which, however, entail significant labor-management disadvantages and corresponding additional expenses for the farmer as a result of additional application costs.

Möglichkeiten zur Einschränkung der Stickstoffverluste bestehen in der gezielten Hemmung der ureasekatalysierten Harnstoff-Hydrolyse auf der einen und der Nitrifikationshemmung auf der anderen Seite. Dabei erscheint im ersten Fall der Einsatz solcher Substanzen aussichtsreich, die zu einer Ureasehemmung führen, wobei sich neben der Anwendung für Düngungszwecke selbstverständlich auch die Anwendung zur Minimierung der Ammoniakbelastung in Tierställen oder deren Zusatz zu Futterharnstoff anbietet.Options for limiting nitrogen losses include the targeted inhibition of urease-catalyzed urea hydrolysis on the one hand and nitrification inhibition on the other. In the first case, the use of such substances appears promising, which lead to urease inhibition, which in addition to the application for fertilization purposes, of course, the application for minimizing the ammonia load in animal sheds or their addition to feed urea offers.

Der Einsatz von Ureaseinhibitoren ist eine effektive Möglichkeit, die unter Normalbedingungen außerordentlich schnell verlaufende enzymatische Harnstoff-Hydrolyse deutlich zu verlangsamen. Durch die Verzögerung dieser Enzymreaktion kann der Düngeharnstoff unzersetzt in tiefere Bodenschichten penetrieren.The use of urease inhibitors is an effective way to significantly slow down the enzymatic urea hydrolysis, which is extremely rapid under normal conditions. Due to the delay of this enzyme reaction, the fertilizer urea can penetrate undecomposed into deeper soil layers.

Damit sind Ammoniakverluste durch das Sorptionspotential der darüber befindlichen Bodenschichten, anders als an der Bodenoberfläche, nahezu ausgeschlossen. Außerdem gelingt es auf diesem Wege, Harnstoff und harnstoffhaltige Dünger für leichte Bodenstandorte verlustfrei zur Anwendung zu bringen.Thus, ammonia losses due to the sorption potential of the soil layers above it, unlike at the soil surface, almost impossible. In addition, it succeeds in this way to bring urea and urea-containing fertilizer for light soil locations lossless application.

In Tierställen kann die Emission von Ammoniak aus Dung und tierischen Exkrementen durch Zusatz eines Ureaseinhibitors auf effektive Weise eingeschränkt werden.In animal houses, the emission of ammonia from manure and animal excrement can be effectively reduced by the addition of a urease inhibitor.

Aus der Sicht der verlustfreien und damit umweltentlastenden Lagerung und Ausbringung von organischen Düngern wie Mist oder Gülle ist der Einsatz von Ureaseinhibitoren, gegebenenfalls auch in Kombination mit Nitrifikationsinhibitoren, gleichfalls eine empfehlenswerte Maßnahme, um die Dünger- und damit Düngungseffizienz von Wirtschaftsdüngern zu erhöhen.From the point of view of lossless and thus environmentally friendly storage and application of organic fertilizers such as manure or liquid manure, the use of urease inhibitors, optionally also in combination with nitrification inhibitors, also a recommended measure to increase the fertilizer and thus fertilization efficiency of manure.

Es ist bekannt, dass speziell in der Tierfütterung von Wiederkäuern die Versorgung der Tiere mit proteinreicher und damit leistungsfördernder Nahrung teilweise ein finanzielles Problem für den Landwirt darstellt, in einigen Regionen der Erde jedoch auch aus klimatischen Gründen ein über das volle Jahr unlösbares Problem ist. Aus heutiger Sicht ist die Substitution pflanzlichen Eiweißes durch Tiermehl in der Wiederkäuerernährung gesundheitspolitisch nicht zu vertreten. Um dieser Situation gerecht zu werden, bietet sich eine teilweise Substitution der hochwertigen proteinreichen pflanzlichen Ernährung der Tiere durch sogenannte »non-protein-nitrogen-Verbindungen« (NPN-Verbindungen) an. Diese Rolle kann der Harnstoff übernehmen, wenn es gelingt, die im Pansen der Tiere ablaufende ureasekatalysierte Harnstoff-Hydrolyse so zu kontrollieren, dass die freigesetzten Ammoniakraten durch anwesende Mikroorganismen sofort zu mikrobiellem Protein verarbeitet werden und demzufolge keine toxischen Effekte auslösen können. Hier bietet sich gleichfalls der Einsatz geeigneter Ureaseinhibitoren an.It is well known that, especially in animal feed for ruminants, feeding animals with protein-rich and thus performance-enhancing food is sometimes a financial problem for the farmer, but in some regions of the world, for climatic reasons, a problem that can not be solved over the whole year. From today's perspective, the substitution of vegetable protein by animal meal in the ruminant nutrition health policy is not responsible. In order to meet this situation, a partial substitution of the high-quality protein-rich plant nutrition of the animals by so-called "non-protein-nitrogen compounds" (NPN compounds) is appropriate. The urea can take on this role if it is possible to control the urease-catalyzed urea hydrolysis taking place in the rumen of the animals in such a way that the released ammonia rates are immediately processed into microbial protein by the presence of microorganisms and consequently can not trigger any toxic effects. The use of suitable urease inhibitors is also suitable here.

Aus der Literatur ist bekannt, dass bestimmte organische, aber auch anorganische Verbindungen die ureasekatalysierte Harnstoff-Hydrolyse zu hemmen vermögen (vgl. S. Kiss, M. Simihäian, Improving Efficiency of Urea Fertilizers by Inhibition of Soil Urease Activity, Kluwer Academic Publishers (2002 )).From the literature it is known that certain organic, but also inorganic compounds are able to inhibit the urease-catalyzed urea hydrolysis (cf. S. Kiss, M. Simihäian, Improving Efficiency of Urea Fertilizers by Inhibition of Soil Urease Activity, Kluwer Academic Publishers (2002 )).

Mit der Entdeckung der Phosphorsäureesterdiamide ( DD 122 177 ) sind Verbindungen gefunden worden, die äußerst effektive Ureaseinhibitoren darstellen. Ähnlich wirksam ist eine Reihe von Derivaten des Phosphorsäuretriamids einschließlich des Grundkörpers (vgl. bspw. US 4,540,428 , US 4,676,822 , US 4,696,693 , US 4,537,614 , US 4,517,004 , EP 0 119 487 ), von denen das N-(n-Butyl)thiophosphorsäuretriamid (NBTPT) als einziger Vertreter bisher kommerzialisiert wurde (IMC AGRICO Corp., Produktbezeichnung Agrotain®).With the discovery of phosphoric acid ester diamides ( DD 122 177 ) compounds have been found which are extremely effective urease inhibitors. Similarly effective is a series of derivatives of phosphoric triamide, including the main body (cf., for example, US Pat. US 4,540,428 . US 4,676,822 . US 4,696,693 . US 4,537,614 . US 4,517,004 . EP 0 119 487 ), of which the N- (n-butyl) thiophosphoric triamide (NBTPT) has been commercialized as the sole representative (IMC AGRICO Corp., product name Agrotain®).

Bei genauer Prüfung dieser Substanzen zeigt es sich, dass einige relativ hydrolyseanfällig sind, wodurch vor allem ihre Wirkungsdauer und somit ihre Anwendbarkeit erheblich eingeschränkt ist. Zum anderen sind sie teilweise nur in geringer Ausbeute oder mittels aufwendiger Herstellungsverfahren erhältlich, so dass eine vertretbare Ökonomie nicht gegeben ist. Aufgrund der Hydrolyseanfälligkeit des NBTPT und dessen Instabilität in Kombination mit harnstoffbasierten Düngemitteln kommt dieser Wirkstoff als Flüssigformulierung zum Einsatz, wobei die Formulierung unmittelbar vor der Düngerapplikation mit dem harnstoffbasierten Düngemittel gemischt wird, was äußerst unökonomisch ist. Eine gleichmäßige Wirkstoffverteilung auf den Düngergranalien kann so kaum gewährleistet werden. Darüber hinaus versagt NBTPT unter anaeroben Bedingungen im Reisanbau, also gerade dort, wo die höchsten Stickstoffverluste und Ammoniakemissionen zu verzeichnen sind, da die Bildung des Sauerstoffanalogons des NBTPT und damit des eigentlichen Ureaseinhibitors nicht oder nur langsam möglich ist (vgl. Fertilizer Research 42, 251 (1995 )).Exact examination of these substances shows that some are relatively susceptible to hydrolysis, which considerably limits their duration of action and thus their applicability. On the other hand, they are sometimes available only in low yield or by means of complex manufacturing processes, so that a justifiable economy is not given. Due to the susceptibility to hydrolysis of NBTPT and its instability in combination with urea-based fertilizers, this active ingredient is used as a liquid formulation, with the formulation being mixed with the urea-based fertilizer just prior to fertilizer application, which is highly uneconomical. A uniform distribution of active ingredients on the fertilizer granules can hardly be guaranteed. In addition, NBTPT fails under anaerobic conditions in rice cultivation, ie precisely where the highest nitrogen losses and ammonia emissions are recorded, since the formation of the oxygen analogue of NBTPT and thus of the actual urease inhibitor is not or only slowly possible (cf. Fertilizer Research 42, 251 (1995 )).

Weitere, die Anwendung der erwähnten Verbindungen beeinflussende Nachteile sind, dass sie ein anderes Migrationsverhalten als Harnstoff haben. Dadurch wird der Inhibitor vom Substrat Harnstoff getrennt, was zur Beeinträchtigung der Enzymhemmung führen kann. Möglich ist aber auch, dass ursprünglich wirksame Ureaseinhibitoren, wenn sie mit Boden in Kontakt kommen, ihre Inhibitorwirkung durch Reaktion mit Bodenbestandteilen oder Fixierung an diese verlieren.Other disadvantages affecting the use of the mentioned compounds are that they have a different migration behavior than urea. As a result, the inhibitor is separated from the substrate urea, which can lead to impairment of the enzyme inhibition. But it is also possible that originally effective urease inhibitors, when in contact with soil, lose their inhibitory effect by reaction with soil components or fixation to them.

Neben den N-Verlusten durch unkontrollierte ureasekatalysierte Hydrolyse des Harnstoffs geht Stickstoff in Form von Nitrat verloren, das durch Auswaschung oder Verlagerung in tiefere Bodenschichten der Pflanzenernährung entzogen wird. Darüber hinaus können diese N-Verluste noch erhöht werden, wenn im Verlaufe der raschen Nitrifikation von Ammoniumionen relativ große Mengen an Nitrat gebildet werden, die ihrerseits durch einsetzende Denitrifikation in molekularen Stickstoff überführt werden können und damit gleichfalls für die pflanzliche Ernährung nicht mehr verfügbar sind.In addition to the N losses due to uncontrolled urease-catalyzed hydrolysis of urea, nitrogen is lost in the form of nitrate, which is removed by leaching or transfer to deeper soil layers of plant nutrition. In addition, these N losses can be increased even if in the course of the rapid nitrification of ammonium ions relatively large amounts of nitrate are formed, which in turn can be converted by incipient denitrification in molecular nitrogen and thus are also no longer available for plant nutrition.

Als Nitrifikationsinhibitoren sind beispielsweise substituierte Pyrazole ( DD 131 063 , US 3,635,690 ), Triazole ( DE-OS 18 04 994 , US 3,697,244 , US 3,701,645 ) aber auch Wirkstoffkombinationen auf der Basis von Pyrazolverbindungen und Dicyandiamid ( DD 227 957 ) oder von Triazolderivaten und Dicyandiamid ( WO 95/22 515 ) vorgeschlagen worden. Weiterhin werden in US 5,364,438 neue flüssige Stickstoffdünger beschrieben, die neben gelöstem Stickstoff in Form von Harnstoff und anderen Stickstoffnährformen auch Anteile von N-(n-Butyl)thiophosphorsäuretriamid (NBTPT) und Dicyandiamid (DCD) enthalten.As nitrification inhibitors, for example, substituted pyrazoles ( DD 131 063 . US 3,635,690 ), Triazoles ( DE-OS 18 04 994 . US 3,697,244 . US 3,701,645 ) but also drug combinations based on pyrazole compounds and dicyandiamide ( DD 227 957 ) or of triazole derivatives and dicyandiamide ( WO 95/22 515 ) has been proposed. Continue to be in US 5,364,438 described new liquid nitrogen fertilizers containing dissolved nitrogen in the form of urea and other nitrogen nutrients also shares of N- (n-butyl) thiophosphoric triamide (NBTPT) and dicyandiamide (DCD).

Zur umfassenden Minimierung der Stickstoffverluste bei der Anwendung von harnstoffbasierten Düngemitteln bietet sich die Anwendung von Ureaseinhibitoren in Kombination mit Nitrifikationsinhibitoren an. Untersuchungen dazu haben jedoch gezeigt, dass Urease- und Nitrifikationsinhibitoren nicht beliebig miteinander kombiniert werden können, da unter bestimmten Bedingungen sich die zusätzliche Anwendung eines Nitrifikationsinhibitors zum Ureasehemmstoff negativ auf die beabsichtigte Senkung der Ammoniakverluste auswirken kann ( NBTPT/DCD: Biol. Fertil. Soils 36 129 (2002 )). Dieser Befund spiegelt sich auch in den Erträgen wider, die teilweise auf dem Niveau der als Vergleich herangezogenen alleinigen Harnstoffdüngung lagen ( NBTFT/Carbid: Biol. Fertil. Soils 22, 89, (1996 )).To substantially minimize nitrogen losses in the application of urea-based fertilizers, the use of urease inhibitors in combination with nitrification inhibitors. Investigations have shown, however, that urease and nitrification inhibitors can not be arbitrarily combined with each other, since under certain conditions, the additional application of a nitrification inhibitor urease inhibitor may adversely affect the intended reduction of ammonia losses ( NBTPT / DCD: Biol. Fertil. Soils 36 129 (2002 )). This finding is also reflected in the yields, which were partly at the level of the sole urea fertilization used as a comparison ( NBTFT / Carbide: Biol. Fertil. Soils 22, 89, (1996 )).

US-A-4,242,325 offenbart bestimmte Phosphorsäuretriamide als Ureaseinhibitoren. Unter anderem wird auch ein 4-Nitrophenylderivat angegeben. US-A-4,242,325 discloses certain phosphoric triamides as urease inhibitors. Among others, a 4-nitrophenyl derivative is indicated.

In der WO 96/40856 wird die Verwendung von Ureaseinhibitoren zur Unterdrückung des Ammoniakgeruchs in sanitären Einrichtungen beschrieben. Unter anderem werden substituierte Phenylphosphorsäuretriamide als geeignet angegeben.In the WO 96/40856 describes the use of urease inhibitors to suppress ammonia odor in sanitary facilities. Among others, substituted phenylphosphoric triamides are indicated as suitable.

Der vorliegenden Erfindung lag daher die Aufgabe zugrunde, solche Ureaseinhibitoren für die Praxis zur Verfügung zu stellen, die bei der Anwendung mit Düngeharnstoff oder anderen harnstoffbasierten Düngern in der Lage sind, die enzymkatalysierte Harnstoff-Hydrolyse auf ein solches Maß zu beschränken, dass daraus resultierende Stickstoffverluste in Form von Ammoniak nahezu auszuschließen sind bzw. die Ammoniaklast in Tierställen durch spontane Zersetzung des Harnstoffs deutlich reduziert wird. Die neuen Ureaseinhibitoren sollen ohne Wirkungseinbußen mit Nitrifikationsinhibitoren kombinierbar sein, um eine weitere Verbesserung der N-Ausnutzung in harnstoffbasierten Düngemitteln zu erreichen.The present invention therefore an object of the invention to provide such urease inhibitors for the practice available when used with fertilizer or other urea-based fertilizers are able to limit the enzyme-catalyzed urea hydrolysis to such an extent that the resulting nitrogen losses in the form of ammonia are almost impossible or the ammonia load in animal houses by spontaneous decomposition of urea is significantly reduced. The new urease inhibitors should be combinable with nitrification inhibitors without any loss of effect in order to achieve a further improvement in N utilization in urea-based fertilizers.

Gleichermaßen sollen diese Ureaseinhibitoren die im Pansen von Wiederkäuern ablaufende Harnstoffspaltung bei Einsatz von Harnstoff im Rahmen der Tierfütterung so verlangsamen, dass die Tiere durch sonst erfolgende Ammoniak-Intoxikationen keine Schäden erleiden und andererseits den auf diese Weise angebotenen Stickstoff für die körpereigene Proteinbiosynthese verwerten können.Likewise, these urease inhibitors should slow down the urea cleavage in the rumen of ruminants when using urea as part of animal feeding so that the animals suffer no damage from otherwise taking ammonia intoxications and on the other hand can utilize the thus offered nitrogen for the body's protein biosynthesis.

Ein weiteres Anwendungsgebiet ist die Medizin. Die Ureaseinhibitoren können zur Prophylaxe oder Therapie von Störungen oder Erkrankungen eingesetzt werden, die direkt oder indirekt durch Ureaseaktivität induziert oder begünstigt werden. Beispiele dafür sind die Katheterverkrustung, entzündliche und ulzeröse Magen- und Darmerkrankungen, Urolithiasis, Pyelonephritis, Nephrolithiasis, Ammoniak-Encephalopathie, hepatische Encephalopathie, hepatisches Koma, Harnwegsinfektionen und gastrointestinale Infektionen. Diese können beispielsweise durch Urease produzierende Mikroorganismen wie Helicobacter pylori verursacht werden.Another area of application is medicine. The urease inhibitors can be used for the prophylaxis or therapy of disorders or diseases that are induced or promoted directly or indirectly by urease activity. Examples include catheter encrustation, inflammatory and ulcerative gastric and intestinal diseases, urolithiasis, pyelonephritis, nephrolithiasis, ammonia encephalopathy, hepatic encephalopathy, hepatic coma, urinary tract infections, and gastrointestinal infections. These can be caused for example by urease-producing microorganisms such as Helicobacter pylori.

Diese Aufgaben werden erfindungsgemäß durch die Bereitstellung und Verwendung der N-(2-Nitrophenyl)phosphorsäuretriamide mit den in Anspruch 1 definierten Strukturen gelöst.These objects are achieved by the provision and use of the N - (2-nitrophenyl) phosphoric triamides having the structures defined in claim 1.

Es hat sich nämlich überraschenderweise gezeigt, dass die erfindungsgemäß bereitgestellten und eingesetzten N-(2-Nitrophenyl)phosphorsäuretriamide bei geeigneter Substitution am Phenylrest hocheffektive Ureaseinhibitoren mit außerordentlich langanhaltender Wirkung darstellen. Neben einer ausreichenden Hydrolysebeständigkeit sind die erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide außerdem technisch problemlos und kostengünstig aus einfachen Ausgangsstoffen herstellbar. Die erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide sind außerdem mit gebräuchlichen Verfahren leicht in Harnstoff oder harnstoffbasierte Düngemitteln einarbeitbar, womit eine effiziente Ausbringung zusammen mit dem Düngemittel bzw. Verfütterung an Wiederkäuer möglich ist. Sie sind sowohl ausreichend wasserlöslich als auch gut öllöslich, was ebenfalls nicht vorhersehbar war. Ein weiterer Vorteil der erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide ist deren problemlose Kombinierbarkeit mit Nitrifikationsinhibitoren.It has surprisingly been found that the N - (2-nitrophenyl) phosphoric triamides provided and used according to the invention, with suitable substitution on the phenyl radical, are highly effective urease inhibitors with an extremely long-lasting effect. With ample hydrolysis north of the invention are - (2-nitrophenyl) phosphoric also technical problems and cost-effectively from simple starting materials. The N inventive - (2-nitrophenyl) phosphoric come equipped with common Method easily incorporated into urea or urea-based fertilizers, which is an efficient application together with the fertilizer or feeding to ruminants possible. They are both sufficiently water-soluble and well oil-soluble, which was also unpredictable. Another advantage of the invention N - (2-nitrophenyl) phosphoric whose easy combinability with nitrification inhibitors.

Die Erfindung betrifft ferner Verfahren zur Herstellung der erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide wie in Anspruch 3 definiert, Zusammensetzungen, die diese N-(2-Nitrophenyl)phosphorsäuretriamide enthalten, wie in Anspruch 3 definiert, eine Düngemittelzusammensetzung wie in Anspruch 7 definiert sowie die in den Ansprüchen 10 bis 16 definierten Verwendungen.The invention further relates to methods for the preparation of N invention - (2-nitrophenyl) phosphoric acid triamides as defined in claim 3, compositions containing these n - (2-nitrophenyl) phosphoric acid triamides as defined in claim 3, a fertilizer composition as defined in claim 7 and the uses defined in claims 10 to 16.

Weitere vorteilhafte und/oder bevorzugte Ausführungsformen der Erfindung sind Gegenstand der Unteransprüche.Further advantageous and / or preferred embodiments of the invention are the subject of the dependent claims.

Die erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide als Ureaseinhibitoren besitzen die allgemeine Formel (I):

Figure imgb0001
in der:

  • X = Sauerstoff oder Schwefel
  • R1, R2, R3, R4 = unabhängig voneinander Wasserstoff, C1-C8-Alkyl/Heteroalkyl, C2-C8-Alkenyl/Heteroalkenyl, C2-C8-Alkinyl/Heteroalkinyl. C3-C8-Cycloalkyl/Heterocycloalkyl, C3-C8-Cycloalkenyl/Heterocycloalkenyl, C6-C10-Aryl/C5-C10-Heteroaryl, Aralkyl, Heteroarylalkyl, Alkaryl, Alkheteroaryl, Alkoxy, Aryloxy, Hetaryloxy, Alkylthio, Arylthio, Hetarylthio, Acyl, Aroyl, Hetaroyl, Acyloxy, Aroyloxy, Hetaroyloxy, Alkoxycarbonyl, Aryloxycarbonyl, Hetaryloxycarbonyl, Alkylsulfonyl, Fluor, Chlor, Brom, Iod, Cyano, Nitro, Sulfo, Carbonyl, Carboxy, Carbamoyl, Sulfamoyl bedeuten,
wobei zwei benachbarte Reste R miteinander über eine Alkylen- bzw. Alkenylen-Kette unter Bildung eines 5-6-gliedrigen, ggf. aromatischen Ringsystems verknüpft sein können, welches ggf. ein oder mehrere Heteroatome, wie Sauerstoff, Stickstoff oder Schwefel enthalten kann,
wobei die Reste R1-R4 gegebenenfalls selber und unabhängig voneinander mit einer oder mehreren der oben genannten Gruppen sowie durch Amino, Alkylamino, Dialkylamino, Hydroxy, Mercapto substituiert sein können,
sowie Salze, Tautomere und Metallkomplexe von Verbindungen der allgemeinen Formel (I), die ureaseinhibierende Wirkung haben.The N inventive - (2-nitrophenyl) phosphoric as urease inhibitors have the general formula (I):
Figure imgb0001
in the:
  • X = oxygen or sulfur
  • R 1 , R 2 , R 3 , R 4 = independently of one another are hydrogen, C 1 -C 8 -alkyl / heteroalkyl, C 2 -C 8 -alkenyl / heteroalkenyl, C 2 -C 8 -alkynyl / heteroalkynyl. C 3 -C 8 -cycloalkyl / heterocycloalkyl, C 3 -C 8 -cycloalkenyl / heterocycloalkenyl, C 6 -C 10 -aryl / C 5 -C 10 -heteroaryl, aralkyl, heteroarylalkyl, alkaryl, alkheteroaryl, alkoxy, aryloxy, hetaryloxy, Alkylthio, arylthio, hetarylthio, acyl, aroyl, hetaroyl, acyloxy, aroyloxy, hetaroyloxy, alkoxycarbonyl, aryloxycarbonyl, hetaryloxycarbonyl, alkylsulfonyl, fluorine, chlorine, bromine, iodine, cyano, nitro, sulfo, carbonyl, carboxy, carbamoyl, sulfamoyl,
wherein two adjacent radicals R may be linked together via an alkylene or alkenylene chain to form a 5-6 membered, optionally aromatic ring system which may optionally contain one or more heteroatoms, such as oxygen, nitrogen or sulfur,
where the radicals R 1 -R 4 may optionally themselves and independently of one another be substituted by one or more of the abovementioned groups and by amino, alkylamino, dialkylamino, hydroxy, mercapto,
and salts, tautomers and metal complexes of compounds of the general formula (I) which have urease-inhibiting activity.

Die Reste R1-R4 können gegebenenfalls selber und unabhängig voneinander mit einer oder mehreren der oben genannten Gruppen sowie durch Amino, Alkylamino, Dialkylamino, Hydroxy, Mercapto substituiert sein. Zwei benachbarte Reste R (z.B. R1 und R2) können miteinander über eine Alkylen- bzw. Alkenylen-Kette unter Bildung eines 5-6-gliedrigen, ggf. aromatischen Ringsystems verknüpft sein, welches ggf. ein oder mehrere Heteroatome, wie Sauerstoff, Stickstoff oder Schwefel enthalten und durch oben genannte Gruppen substituiert sein kann.The radicals R 1 -R 4 may optionally be substituted independently and independently of one another by one or more of the abovementioned groups and by amino, alkylamino, dialkylamino, hydroxy, mercapto. Two adjacent radicals R (for example R 1 and R 2 ) may be linked to one another via an alkylene or alkenylene chain to form a 5-6-membered, optionally aromatic ring system which may contain one or more heteroatoms, such as oxygen, Contain nitrogen or sulfur and may be substituted by the above groups.

Ein bevorzugtes N-(2-Nitrophenyl)phosphorsäuretriamide der vorliegenden Erfindung entspricht der Formel (II):

Figure imgb0002
A preferred N- (2-nitrophenyl) phosphoric triamide of the present invention corresponds to the formula (II):
Figure imgb0002

Außerdem umfasst die Erfindung Salze, Tautomere und Metallkomplexe von Verbindungen der allgemeinen Formel (I) oder (II), die ureaseinhibierende Wirkung haben.In addition, the invention includes salts, tautomers and metal complexes of compounds of the general formula (I) or (II) which have urease-inhibiting activity.

Selbstverständlich wird der Fachmann die in der allgemeinen Formel (I) angegebenen Reste bzw. Gruppen so auswählen, dass keine unmöglichen Moleküle entstehen, z.B. chemisch oder sterisch unmögliche.Of course, those skilled in the art will select the radicals or groups given in the general formula (I) such that no impossible molecules are formed, e.g. chemically or sterically impossible.

Die im folgenden erwähnten Alkyl-, Alkenyl- oder Alkinyl-Gruppen mit der entsprechenden Kohlenstoffanzahl können geradkettig oder verzweigt und einfach oder mehrfach ungesättigt sein.The alkyl, alkenyl or alkynyl groups with the corresponding carbon number mentioned below may be straight-chain or branched and mono- or polyunsaturated.

Im folgenden wird zwar zur Vermeidung unnötiger Redundanz auch gelegentlich der Einfachheit halber nur der Begriff »Alkyl-Gruppe«, »Heteroalkyl-Gruppe« oder »Cycloalkyl-Gruppe« etc. verwendet, jedoch sollen jeweils die entsprechenden ungesättigten Gruppen umfaßt sein. Dem Fachmann ist klar, daß Alkenyl- oder Alkinyl-Gruppen mindestens 2 Kohlenstoffatome und cyclische Kohlenwasserstoff-Gruppen mindestens 3 Kohlenstoffatome aufweisen müssen.In the following, although the term "alkyl group", "heteroalkyl group" or "cycloalkyl group", etc. is used occasionally for the sake of simplicity, to avoid unnecessary redundancy, the corresponding unsaturated groups should be included in each case. It will be understood by those skilled in the art that alkenyl or alkynyl groups must have at least 2 carbon atoms and cyclic hydrocarbon groups must have at least 3 carbon atoms.

Der Begriff »Alkyl« bezieht sich, und zwar in jeder Kombination mit beliebigen anderen Gruppen, insbesondere auf eine Alkyl-Gruppe, die 1 bis 8 Kohlenstoffatome aufweist, z.B. eine Methyl-, Ethyl-, n-Propyl-, Isopropyl-, n-Butyl-, Isobutyl-, tert-Butyl, Amyl, Isoamyl, n-Hexyl-, 2,2-Dimethylbutyl- oder n-Octyl-Gruppe.The term "alkyl" refers to any combination with any other groups, especially an alkyl group having from 1 to 8 carbon atoms, e.g. a methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, amyl, isoamyl, n-hexyl, 2,2-dimethylbutyl or n-octyl group.

Der Begriff »Alkenyl« bezieht sich, und zwar in jeder Kombination mit beliebigen anderen Gruppen, insbesondere auf eine Alkenyl-Gruppe, die 2 bis 8 Kohlenstoffatome aufweist, z.B. eine Ethenyl-, n-Propenyl-, Isopropenyl-, n-Butenyl-, Isobutenyl-, tert-Butenyl, n-Hexenyl-, 2,2-Dimethylbutenyl-, n-Octenyl-, Allyl-, Isoprenyl- oder Hex-2-enyl-Gruppe.The term "alkenyl" refers to any combination with any other groups, especially an alkenyl group having from 2 to 8 carbon atoms, e.g. an ethenyl, n-propenyl, isopropenyl, n-butenyl, isobutenyl, tert-butenyl, n-hexenyl, 2,2-dimethylbutenyl, n-octenyl, allyl, isoprenyl or hex-2 enyl group.

Der Begriff »Alkinyl« bezieht sich, und zwar in jeder Kombination mit beliebigen anderen Gruppen, insbesondere auf eine Alkinyl-Gruppe, die 2 bis 8 Kohlenstoffatome aufweist, z.B. eine Ethinyl-, n-Propinyl-, Isopropinyl-, n-Butinyl-, Isobutinyl-, tert-Butinyl, n-Hexinyl-, 2,2-Dimethylbutinyl- oder n-Octinyl-Gruppe.The term "alkynyl" refers to any combination with any other groups, especially an alkynyl group having from 2 to 8 carbon atoms, e.g. an ethynyl, n-propynyl, isopropynyl, n-butynyl, isobutinyl, tert-butynyl, n-hexynyl, 2,2-dimethylbutynyl or n-octynyl group.

Der Begriff »Heteroalkyl« bezieht sich bzgl. des Alkylteils auf eine oben definierte Alkyl-Gruppe, soll aber auch eine entsprechende Heteroalkenyl- oder Heteroalkinyl-Gruppe umfassen, in der ein oder mehrere Kohlenstoffatome durch mindestens ein Sauerstoff-, Stickstoff-, Phosphor- oder Schwefelatom ersetzt sind.The term "heteroalkyl" refers with respect to the alkyl part to an alkyl group as defined above, but should also include a corresponding heteroalkenyl or heteroalkynyl group in which one or more carbon atoms by at least one oxygen, nitrogen, phosphorus or Sulfur atom are replaced.

Es ist klar, daß sämtliche der oben definierten Gruppen mit sich selbst oder anderen der oben definierten Gruppen substituiert sein können, sofern die ureaseinhibierende Wirkung erhalten bleibt.It is clear that all of the groups defined above may be substituted with themselves or with other groups as defined above, provided that the urease-inhibiting effect is maintained.

Der Begriff »Aryl« bezieht sich auf eine aromatische cyclische Gruppe, die einen oder mehrere Ringe aufweist, und durch ein Gerüst gebildet wird, das 6 bis 10 Ringkohlenstoffatome enthält. Selbstverständlich kann im Falle von mehreren Ringen einer oder auch mehrere Ringe ganz oder teilweise hydriert sein (ein Beispiel dafür ist die 1,2,3,4,-Tetrahydro-naphthalen-1-yl-Gruppe). Außerdem kann eine Aryl-Gruppe durch Alkyl- oder Heteroalkyl-Gruppen (jeweils wie oben definiert) substituiert sein. Beispiele sind eine Phenyl-, Naphthyl-, Inden-, 2-, 3- oder 4-Methoxyphenyl-, 2-, 3-oder 4-Ethoxyphenyl-, 4-Carboxyphenylalkyl- oder 4-Hydroxyphenyl-Gruppe.The term "aryl" refers to an aromatic cyclic group having one or more rings and is formed by a skeleton containing 6 to 10 ring carbon atoms. Of course, in the case of several rings, one or more rings may be completely or partially hydrogenated (an example being the 1,2,3,4-tetrahydro-naphthalen-1-yl group). In addition, an aryl group may be substituted by alkyl or heteroalkyl groups (each as defined above). Examples are a phenyl, naphthyl, indene, 2-, 3- or 4-methoxyphenyl, 2-, 3- or 4-ethoxyphenyl, 4-carboxyphenylalkyl or 4-hydroxyphenyl group.

Die Begriffe »Aralkyl« bzw. »Heteroarylalkyl« beziehen sich auf Gruppen, die entsprechend den obigen bzw. folgenden Definitionen sowohl Aryl- bzw. Heteroaryl-(weiter unten definiert) wie auch Alkyl- und/oder Heteroalkyl- (auch die entsprechenden Alkylen/Heteroalkylen- und Alkinyl/Heteroalkinyl-Gruppen) und/oder carbocyclische Gruppen (weiter unten definiert) und/oder Heterocycloalkyl-Ringsysteme (weiter unten definiert) umfassen, z.B. eine Tetrahydroisochinolinyl-, Benzyl-, 2- oder 3-Ethylindolyl- oder 4-Methylpyridino-Gruppe.The terms "aralkyl" or "heteroarylalkyl" refer to groups which according to the above or following definitions are both aryl or heteroaryl (defined below) as well as alkyl and / or heteroalkyl (also the corresponding alkylene / Heteroalkylene and alkynyl / heteroalkynyl groups) and / or carbocyclic groups (defined below) and / or heterocycloalkyl ring systems (defined below), eg a tetrahydroisoquinolinyl, benzyl, 2- or 3-ethyl-indolyl or 4-methylpyridino group.

Die Begriffe »Aralkyl« bzw. »Heteroarylalkyl« sollen, zur Vermeidung unnötiger Redundanz, auch die Begriffe »Alkaryl« bzw. »Alkheteroaryl« umfassen.The terms "aralkyl" and "heteroarylalkyl" are also intended to include the terms "alkaryl" and "alkheteroaryl" to avoid unnecessary redundancy.

Der Begriff »Cycloalkyl« bzw. »carbocyclisch« bezieht sich auf eine gesättigte oder teilweise ungesättigte, cyclische, ggf. verzweigte, Gruppe, die einen oder mehrere Ringe aufweist, die ein Gerüst bilden, welches 3 bis 8 Kohlenstoffatome enthält, z.B. eine Cyclopropyl-, Cyclobutyl-, Cyclopentyl-, Cyclohexyl-, Tetralin-, Cyclopentenyl-oder Cyclohex-2-enyl-Gruppe.The term "cycloalkyl" or "carbocyclic" refers to a saturated or partially unsaturated, cyclic, optionally branched, group having one or more rings forming a skeleton containing from 3 to 8 carbon atoms, e.g. a cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, tetralin, cyclopentenyl or cyclohex-2-enyl group.

Der Begriff »Heterocycloalkyl« bezieht sich auf die oben definierten Cycloalkyl- bzw. carbocylischen Gruppen, bei denen ein oder mehrere Kohlenstoffatome durch ein oder mehrere Sauerstoff-, Stickstoff-, Phosphor- oder Schwefelatome ersetzt sind. Konkrete Beispiele sind Aziridin-, Furan-, Pyrrolidin-, Piperidin-, Morpholin-, Oxazolidin-, Thiazolidin-, N-Methylpiperazino oder N-Phenylpiperazin-Gruppen.The term "heterocycloalkyl" refers to the above-defined cycloalkyl or carbocyclic groups in which one or more carbon atoms are replaced by one or more oxygen, nitrogen, phosphorus or sulfur atoms. Specific examples are aziridine, furan, pyrrolidine, piperidine, morpholine, oxazolidine, thiazolidine, N-methylpiperazino or N-phenylpiperazine groups.

Der Begriff »Heteroaryl« bezieht sich auf eine Aryl-Gruppe mit 5 bis 10 Ringatomen, in der ein oder mehrere Kohlenstoffatome durch ein Sauerstoff-, Stickstoff-, Phosphor- oder Schwefelatom ersetzt sind. Beispiele sind Pyrrol-, Furan-, Thiophen-, Pyrazol-, Isoxazol-, Isothiazol-, Imidazol-, Oxazol-, Thiazol-, 1,2,4-Triazol-, 1,2,4-Oxadiazol-, 1,2,4-Thiadiazol-, 1,3,4-Oxadiazol-, 1,3,4-Thiadiazol-, 1,2,5-Oxadiazol-, 1,2,5-Thiadiazol, Tetrazol, Pyridin-, Pyridazin-, Pyrimidin-, Pyrazin-, 1,2,3-Triazin-, 1,2,4-Triazin-, 1,3,5-Triazin- und Indol-Gruppen.The term "heteroaryl" refers to an aryl group of 5 to 10 ring atoms in which one or more carbon atoms are replaced by an oxygen, nitrogen, phosphorus or sulfur atom. Examples are pyrrole, furan, thiophene, pyrazole, isoxazole, isothiazole, imidazole, oxazole, thiazole, 1,2,4-triazole, 1,2,4-oxadiazole, 1,2 , 4-thiadiazole, 1,3,4-oxadiazole, 1,3,4-thiadiazole, 1,2,5-oxadiazole, 1,2,5-thiadiazole, tetrazole, pyridine, pyridazine, pyrimidine , Pyrazine, 1,2,3-triazine, 1,2,4-triazine, 1,3,5-triazine and indole groups.

Es sei nochmal darauf hingewiesen, daß sämtliche der oben definierten Gruppen sowohl mit sich selbst als auch mit anderen der oben definierten Gruppen substituiert sein können, sofern die ureaseinhibierende Wirkung erhalten bleibt.It should again be noted that all of the groups defined above may be substituted both with themselves and with other groups defined above, provided that the urease-inhibiting effect is maintained.

Die erfindungsgemäßen Verbindungen I sind durch analoge Anwendung bekannter Verfahren zugänglich ( Chem. Ber. 26, 2937 (1893 ); J. Chem. Soc. 81, 1362 (1902 ); Z. Obsc. Chim. 30, 4048 (1960 )), wobei X, R1 - R5 die oben beschriebene Bedeutung besitzen. Vorzugsweise erfolgt die Herstellung der N-(2-Nitrophenyl)phosphorsäuretriamide in der Weise, dass man

  • a1) 2-Nitroaniline oder deren Hydrochloride mit Phosphorylchlorid (POCl3) oder Thiophosphorylchlorid (PSCl3), gegebenenfalls in Anwesenheit eines organischen Lösungsmittels und einer tertiären Base, bei Temperaturen von 0 bis 150 °C, gegebenenfalls unter Schutzgasatmosphäre, entsprechend Gleichung (1) zu N-(2-Nitrophenyl)phosphorsäureamiddichloriden des Typs (A) umsetzt, wobei Verbindungen (A) mit X = S alternativ auch durch Schwefelung der entsprechenden Sauerstoffderivate erhalten werden können,
    Figure imgb0003
    oder
  • a2) Phosphorpentachlorid (PCl5) mit einem 2-Nitroanilin, in annähernd äquimolarem Verhältnis, gegebenenfalls in einem inerten organischen Lösemittel und gegebenenfalls unter Schutzgasatmosphäre bei 0 bis 150°C entsprechend Gleichung (2) zu Verbindungen des Typs (B) reagieren lässt, welche, gegebenenfalls ohne weitere Isolation, mit einer annähernd äquimolaren Menge Ameisensäure oder Wasser zu N-(2-Nitrophenyl)phosphorsäureamiddichloriden des Typs (A) umgesetzt werden, wobei Verbindungen (A) mit X = S durch Schwefelung der entsprechenden Sauerstoffderivate erhalten werden können,
    Figure imgb0004
    und anschließend
  • b) die in Stufe a1) oder a2) gebildeten Verbindungen des Typs (A) mit Ammoniak, gegebenenfalls in einem inerten organischen Lösemittel, bei Temperaturen von -80 bis 30 °C entsprechend Gleichung (3) zum gewünschten Endprodukt reagieren lässt:
    Figure imgb0005
The compounds I according to the invention can be obtained by analogous application of known processes ( Chem. Ber. 26, 2937 (1893 ); J. Chem. Soc. 81, 1362 (1902 ); Z. obsc. Chim. 30, 4048 (1960 )), wherein X, R 1 - R 5 have the meaning described above. Preferably, the preparation of N - (2-nitrophenyl) phosphoric triamides is carried out in such a way that
  • a 1 ) 2-nitroanilines or their hydrochlorides with phosphoryl chloride (POCl 3 ) or thiophosphoryl chloride (PSCl 3 ), optionally in the presence of an organic solvent and a tertiary base, at temperatures of 0 to 150 ° C, optionally under a protective gas atmosphere, according to equation (1 ) to N - (2-nitrophenyl) phosphoric acid amide dichlorides of the type (A), wherein compounds (A) with X = S can alternatively also be obtained by sulfurization of the corresponding oxygen derivatives,
    Figure imgb0003
    or
  • a 2 ) phosphorus pentachloride (PCl 5 ) with a 2-nitroaniline, in approximately equimolar ratio, optionally in an inert organic solvent and optionally under a protective gas atmosphere at 0 to 150 ° C according to equation (2) reacts to compounds of type (B), which, optionally without further isolation, are reacted with an approximately equimolar amount of formic acid or water to give N- (2-nitrophenyl) phosphoric acid amide dichlorides of type (A), whereby compounds (A) with X = S can be obtained by sulfurization of the corresponding oxygen derivatives,
    Figure imgb0004
    and subsequently
  • b) reacting the compounds of type (A) formed in stage a 1 ) or a 2 ) with ammonia, if appropriate in an inert organic solvent, at temperatures of -80 to 30 ° C. in accordance with equation (3) to give the desired end product:
    Figure imgb0005

Die erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide oder diese enthaltende Zusammensetzungen weisen bei geeigneter Substitution am Phenylrest eine für praktische Belange hervorragende Inhibitionswirkung auf, wodurch sie die enzymatische Harnstoff-Hydrolyse so verlangsamen oder vorübergehend ausschalten können, dass Ammoniakverluste im Rahmen von Düngungsmaßnahmen unter Verwendung organischer und/oder mineralischer harnstoffhaltiger Stickstoffdünger auf ein Minimum reduziert werden bzw. das Auftreten schädlicher oder lästiger Ammoniakkonzentrationen in der Tierhaltung ausgeschlossen wird, beispielsweise durch Harnstoffabbau in tierischen Exkrementen oder durch den Abbau von Futterharnstoff im Pansen im Rahmen der Wiederkäuerernährung.The N invention - (2-nitrophenyl) phosphoric or compositions containing the same have with appropriate substitution on the phenyl radical excellent for practical purposes inhibitory effect on, whereby they can slow down or the enzymatic urea hydrolysis so temporarily turn that ammonia losses under fertilizer treatments using organic and / or mineral urea-containing nitrogen fertilizer are reduced to a minimum or the occurrence of harmful or troublesome ammonia concentrations in animal husbandry is excluded, for example by urea degradation in animal excreta or by the degradation of feed urea in the rumen as part of the ruminant diet.

Dabei ist es unerheblich, ob sich die Wirkung der erfindungsgemäßen N-(2-Nitrophenyl)phosphorsäuretriamide oder diese enthaltenden Zusammensetzungen auf Düngungsmaßnahmen oder auf vorbeugend Maßnahmen zur Vermeidung hoher Ammoniakkonzentrationen in Tierställen erstreckt oder aber für den Einsatz von Futterharnstoff im Rahmen der Wiederkäuerernährung genutzt wird.It is irrelevant whether the effect of N inventive - (2-nitrophenyl) phosphoric or compositions containing them extends or fertilizer treatments or preventive measures to avoid high concentrations of ammonia in livestock barns but is used for the use of feed urea within the framework of ruminant nutrition.

Die erfindungsgemäßen Verbindungen werden vorzugsweise gemeinsam mit harnstoffbasierten Düngemitteln, vorzugsweise in einer Menge von 0,001 bis 10 Gew.-%, bezogen auf das Gewicht des harnstoffbasierten Düngemittels, ausgebracht oder dem Futterharnstoff bzw. den in Tierställen anfallenden tierischen Ausscheidungen zugesetzt. Dabei ist es beispielsweise im Rahmen von Düngungsmaßnahmen unwesentlich, ob sie oberflächig vorher auf den Dünger aufgebracht, darin inkorporiert oder gemeinsam oder in vertretbarem Zeitraum getrennt von harnstoffhaltigen Düngemitteln ausgebracht werden.The compounds according to the invention are preferably applied together with urea-based fertilizers, preferably in an amount of 0.001 to 10% by weight, based on the weight of the urea-based fertilizer, or added to the feed urea or animal waste arising in animal stalls. It is immaterial, for example, in the context of fertilization measures, whether they are superficially previously applied to the fertilizer, incorporated therein or applied together or in a reasonable time separately from urea-containing fertilizers.

Ein weiterer Gegenstand der Erfindung sind somit Zusammensetzungen, die die erfindungsgemäß eingesetzten N-(2-Nitrophenyl)phosphorsäuretriamide und ein harnstoffbasiertes mineralisches und/oder organisches Düngemittel enthalten.Another object of the invention are thus compositions containing the inventively used N - (2-nitrophenyl) phosphoric triamides and a urea-based mineral and / or organic fertilizer.

Die erfindungsgemäß vorgeschlagenen Verbindungen können zur gleichzeitigen Verhinderung bzw. Einschränkung der ureasekatalysierten Harnstoff-Hydrolyse sowie der Nitrifikation auf die oben beschriebene Weise mit einer oder mehreren der folgenden Verbindungen, bei denen es sich um Nitrifikationsinhibitoren handelt, beispielsweise in einer Menge von 0,01 bis 10 Gew.-%, bezogen auf das Gewicht des harnstoffbasierten Düngemittels, kombiniert werden:

  1. a) Pyrazol-Derivate der allgemeinen Formel (IV), oder Salze oder Komplexverbindungen davon:
    Figure imgb0006
    in der
    • R7, R8, R9 unabhängig voneinander Wasserstoff, Halogen, C1-C8-Alkyl, oder C3-C8-Cycloalkyl
      und
    • A den Rest H
      oder den Rest
      Figure imgb0007
      mit Y = H, Na, K, NH4
      oder den Rest
      -CH2-B mit B = (Di)alkylamino,
      Figure imgb0008
      oder den Rest
      Figure imgb0009
      mit R10, R11 = H oder Cl und
    • R12 = H oder
      Figure imgb0010
      mit Z = C1-C8-Alkoxy, C1-C8-Alkylamino, C6-C10-Arylamino oder den Rest
      Figure imgb0011
      mit R13 , R14 = H, C1-C8-Alkyl, C7-C18-Alkylaryl, C6-C10-Aryl oder die Reste
      Figure imgb0012
      mit R15 = C1-C20-Alkyl, C3-C8-Cycloalkyl, C6-C10-Aryl oder Alkylaryl aus C1-C4-Alkyl- und C6-C10-Arylgruppen; mit X = Sauerstoff oder Schwefel sowie mit R16 = C1-C4-Alkyl, C3-C8-Cycloalkyl, C6-C10-Aryl oder H,
    bedeuten und die aufgeführten Alkyl- und Arylreste mit sich selber sowie durch C1-C4-Alkylsulfonyl, C1-C4-Alkoxy, C1-C4-Acyl, Halogen, Hydroxyl, Trimethylsilyl, Amino, Nitro, Cyano, Carbonyl, Carboxyl oder C1-C5-Carboxyalkyl substituiert sein können,
  2. b) 1H-1,2,4-Triazole, oder deren Salze oder Komplexverbindungen,
  3. c) Dicyandiamid.
The compounds proposed according to the invention may be used for simultaneously preventing or restricting the urease-catalyzed urea hydrolysis and the nitrification in the manner described above with one or more of the following compounds which are nitrification inhibitors, for example in an amount of 0.01 to 10 Wt .-%, based on the weight of the urea-based fertilizer, are combined:
  1. a) pyrazole derivatives of the general formula (IV), or salts or complex compounds thereof:
    Figure imgb0006
    in the
    • R 7 , R 8 , R 9 independently of one another are hydrogen, halogen, C 1 -C 8 -alkyl, or C 3 -C 8 -cycloalkyl
      and
    • A the rest H
      or the rest
      Figure imgb0007
      with Y = H, Na, K, NH 4
      or the rest
      -CH 2 -B with B = (di) alkylamino,
      Figure imgb0008
      or the rest
      Figure imgb0009
      with R 10 , R 11 = H or Cl and
    • R 12 = H or
      Figure imgb0010
      with Z = C 1 -C 8 -alkoxy, C 1 -C 8 -alkylamino, C 6 -C 10 -arylamino or the radical
      Figure imgb0011
      with R 13 , R 14 = H, C 1 -C 8 -alkyl, C 7 -C 18 -alkylaryl, C 6 -C 10 -aryl or the radicals
      Figure imgb0012
      with R 15 = C 1 -C 20 -alkyl, C 3 -C 8 -cycloalkyl, C 6 -C 10 -aryl or alkylaryl of C 1 -C 4 -alkyl and C 6 -C 10 -aryl groups; with X = oxygen or sulfur and with R 16 = C 1 -C 4 -alkyl, C 3 -C 8 -cycloalkyl, C 6 -C 10 -aryl or H,
    and the listed alkyl and aryl radicals with themselves and by C 1 -C 4 -alkylsulfonyl, C 1 -C 4 -alkoxy, C 1 -C 4 -acyl, halogen, hydroxyl, trimethylsilyl, amino, nitro, cyano, carbonyl , Carboxyl or C 1 -C 5 carboxyalkyl may be substituted,
  2. b) 1H-1,2,4-triazoles, or their salts or complex compounds,
  3. c) dicyandiamide.

Zur Verwendung als Ureaseinhibitoren, beispielsweise zur Senkung der Stickstoffverluste bei der Düngung mit Düngeharnstoff oder harnstoffbasierten Düngern oder zur Verminderung der Ammoniakbelastung aus dem Dung bzw. den tierischen Exkrementen in Tierställen oder zur Vermeidung toxischer Effekte beim Einsatz von Futterharnstoff können die erfindungsgemäß geeigneten Verbindungen auf verschiedene Art und Weise ausgebracht bzw. aufgebracht werden.For use as urease inhibitors, for example to reduce the nitrogen losses during fertilization with fertilizer or urea-based fertilizers or to reduce the ammonia load from the manure or animal excrements in animal sheds or to avoid toxic effects when using feedurea, the compounds suitable according to the invention can be used in various ways and applied or applied.

Die erfindungsgemäßen Verbindungen können in den Harnstoff oder in harnstoffhaltige Düngemittel vor oder während der Granulation aus der schmelzflüssigen Phase eingearbeitet werden. Weiterhin können sie auf die Oberfläche der Harnstoff- bzw. Düngemittelgranalien aufgebracht oder flüssigen harnstoffhaltigen Düngemitteln zugesetzt werden. Schließlich ist die Zugabe der Ureaseinhibitoren zu organischen harnstoffhaltigen Düngern wie Dung oder Gülle möglich. Darüber hinaus können die erfindungsgemäßen Verbindungen auch zusätzlich zur Ausbringung harnstoffbasierter Düngemittel in einem vor- oder nachgelagerten Arbeitsschritt separat auf dem Feld ausgebracht werden. Die erfindungsgemäßen Verbindungen können dabei in reiner Form als pulverfömiger Stoff, Granulat oder Schmelze, wässrige Lösung oder als spezielle Formulierung, versetzt mit den üblichen und dem Fachmann bekannten Hilfs-, Träger- und Streckstoffen oder einer Kombination dieser Mittel, eingesetzt werden. Dabei ist es unerheblich, ob der wirksame Inhaltsstoff in flüssiger Form als z. B. Lösung, Emulsion oder Suspension oder in fester Form als stäub- oder dispergierbares Pulver formuliert wird. Benetzbare Pulver, emulgierbare Konzentrate und Suspensionskonzentrate enthalten gewöhnlich, aber nicht notwendigerweise, oberflächenaktive Mittel, z. B. ein Benetzungs-, Dispersions-, Emulgierungs oder Suspensionsmittel. Die jeweiligen Formulierungsverfahren entsprechen dem Stand der Technik und sind dem Fachmann bekannt.The compounds of the invention may be incorporated into the urea or urea-containing fertilizers prior to or during granulation from the molten phase. Furthermore, they can be applied to the surface of the urea or fertilizer granules or added to liquid urea-containing fertilizers. Finally, it is possible to add the urease inhibitors to organic urea-containing fertilizers, such as manure or manure. In addition, the compounds according to the invention can also be applied separately in the field in addition to the application of urea-based fertilizers in a preceding or subsequent work step. The compounds according to the invention can be used in pure form as pulverfömiger substance, granules or melt, aqueous solution or as a special formulation, mixed with the usual and known in the art auxiliaries, carriers and extenders or a combination of these agents. It is irrelevant whether the active ingredient in liquid form as z. As solution, emulsion or suspension or formulated in a solid form as dusts or dispersible powder. Wettable powders, emulsifiable concentrates and suspension concentrates usually, but not necessarily, contain surfactants, e.g. As a wetting, dispersing, emulsifying or suspending agent. The respective formulation methods correspond to the prior art and are known to the person skilled in the art.

Die erfindungsgemäßen Verbindungen, Zusammensetzungen und Düngemittel können beispielsweise bei der sowie zur Fertigation verwendet werden. Unter Fertigation versteht man die gezielte Zufuhr an Nährstoffen mit dem Bewässerungswasser, das z.B. durch Tropfbewässerung, Besprühen oder Berieseln ausgebracht werden kann. Die Pflanzen erhalten nur die zum optimalen Wachstum erforderliche Menge an Wasser, so dass kein Überschußwasser entsteht. Mangels einer vertikalen Wasserbewegung im Boden unterhalb der Durchwurzelungszone treten Nährstoffauswaschungsverluste praktisch nicht auf. Die Tropfbewässerung, Besprühung oder Berieselung mit Ureaseinhibitoren kann beispielsweise nach der Düngung erfolgen oder auch gemeinsam mit der Düngung. Natürlich besteht keine Beschränkung auf wässrige Lösungen oder sonstige Formulierungen. Beispielsweise können auch versprühbare Suspensionen feiner Teilchen verwendet werden. Insofern sei beispielhaft auf EP 1 378 499 und WO2004/013253 verwiesen.The compounds, compositions and fertilizers according to the invention can be used, for example, in and for fertigation. By fertigation is meant the targeted supply of nutrients with the irrigation water, which can be applied eg by drip irrigation, spraying or sprinkling. The plants receive only the amount of water required for optimal growth so that no excess water is produced. Lack of vertical water movement in the soil beneath the rooting zone virtually eliminates nutrient leaching losses. Drip irrigation, spraying or sprinkling with urease inhibitors can be done, for example, after fertilization or together with the fertilizer. Of course, there is no limitation to aqueous solutions or other formulations. For example, sprayable suspensions of fine particles can also be used. Insofar let's be an example EP 1 378 499 and WO2004 / 013253 directed.

Die vorliegende Erfindung soll nun anhand der folgenden Beispiele ohne Beschränkung und somit lediglich zur Veranschaulichung erläutert werden.The present invention will now be illustrated by the following examples without limitation and thus only by way of illustration.

BeispieleExamples Beispiel 1example 1 N-(2-Nitrophenyl)phosphorsäuretriamid N - (2-nitrophenyl) phosphoric triamide

In einem 100 ml Kolben mit Rückflusskühler und Trockenrohr werden 4,14 g (0,03 mol) 2-Nitroanilin und 6,25 g (0,03 mol) Phosphorpentachlorid in 50 ml Toluol suspendiert und unter Rühren 4 h zum Sieden erhitzt. Nach Abkühlen auf 80 °C werden langsam 1,38 g (0,03 mol) Ameisensäure zugegeben. Man lässt auf Raumtemperatur abkühlen, zieht das Lösungsmittel im Vakuum ab und wäscht den Rückstand mit Petrolether. Das zurückbleibende Öl wird ohne weitere Reinigung in 50 ml Chloroform aufgenommen und unter Feuchtigkeitsausschluss bei -50 bis -30 °C unter Rühren zu einer Lösung von ca. 30 ml flüssigem Ammoniak in 50 ml Chloroform getropft. Anschließend lässt man über Nacht bei Raumtemperatur das überschüssige Ammoniak abdampfen. Das ammoniumchloridhaltige Rohprodukt wird abgesaugt und zur Entfernung des Ammoniumchlorids entweder mit Diethylamin in Chloroform ausgekocht oder mit wenig Wasser gewaschen. Man erhält 3,6 g (55 %) N-(2-Nitrophenyl)phosphorsäuretriamid
Schmelzpunkt: ca. 200 °C (Zers.)
1H-NMR (DMSO-d6): δ [ppm] = 4,54 (s, 4 H, NH2); 6,96 (t, 1 H, CH); 7,60 (t, 1 H, CH); 7,93 (d, 1 H, CH); 8,11 (d, 1 H, CH): 8,34 (d, 1 H, NH)
13C-NMR (DMSO-d6): δ [ppm] = 118,8; 119,9 (d); 125,6; 133,9 (d); 135,6; 140,7 (d)
31P-NMR (DMSO-d6): δ [ppm] = 8,8
In a 100 ml flask with reflux condenser and drying tube 4.14 g (0.03 mol) of 2-nitroaniline and 6.25 g (0.03 mol) of phosphorus pentachloride are suspended in 50 ml of toluene and heated with stirring for 4 h to boiling. After cooling to 80 ° C slowly 1.38 g (0.03 mol) of formic acid are added. The mixture is allowed to cool to room temperature, the solvent is removed in vacuo and the residue is washed with petroleum ether. The remaining oil is taken up without further purification in 50 ml of chloroform and added dropwise with exclusion of moisture at -50 to -30 ° C with stirring to a solution of about 30 ml of liquid ammonia in 50 ml of chloroform. Subsequently, the excess ammonia is allowed to evaporate overnight at room temperature. The ammonium chloride-containing crude product is filtered off with suction and, to remove the ammonium chloride, either boiled with diethylamine in chloroform or washed with a little water. This gives 3.6 g (55%) of N- (2-nitrophenyl) phosphoric triamide
Melting point: about 200 ° C (decomp.)
1 H-NMR (DMSO-d 6 ): δ [ppm] = 4.54 (s, 4H, NH 2 ); 6.96 (t, 1H, CH); 7.60 (t, 1H, CH); 7.93 (d, 1 H, CH); 8.11 (d, 1H, CH): 8.34 (d, 1H, NH)
13 C-NMR (DMSO-d 6 ): δ [ppm] = 118.8; 119.9 (d); 125.6; 133.9 (d); 135.6; 140.7 (d)
31 P-NMR (DMSO-d 6 ): δ [ppm] = 8.8

Vergleichsbeispiel 1Comparative Example 1 N-(3-Methylphenyl)phosphorsäuretriamid N- (3-methylphenyl) phosphoric triamide

In einem 100 ml Kolben mit Rückflusskühler und Trockenrohr werden 14,3 g (0,1 mol) o-Toluidin-Hydrochlorid und 15,3 g (0,1 mol) Phosphorylchlorid in 50 ml Toluol suspendiert und unter Rühren 4 h zum Sieden erhitzt. Nach Abkühlen wird das Lösungsmittel von der entstandenen Lösung im Vakuum abgezogen und der Rückstand mit Petrolether gewaschen. Das zurückbleibende Öl wird ohne weitere Reinigung in 50 ml Chloroform aufgenommen und unter Feuchtigkeitsausschluss bei -50 bis -30 °C unter Rühren zu einer Lösung von ca. 70 ml flüssigem Ammoniak in 100 ml Chloroform getropft. Anschließend lässt man über Nacht bei Raumtemperatur das überschüssige Ammoniak abdampfen. Das ammoniumchloridhaltige Rohprodukt wird abgesaugt und zur Entfernung des Ammoniumchlorids entweder mit Diethylamin in Chloroform ausgekocht oder mit wenig Wasser gewaschen. Man erhält 9,1 g (49 %) N-(3-Methylphenyl)phosphorsäuretriamid.
Schmelzpunkt: 159 - 162°C
1H-NMR (DMSO-d6): δ [ppm] = 2,18 (s, 3 H, CH3); 3,9 (d, 4 H, NH2); 6,52 (d, 1 H, NH); 6,81 (d, 1 H, CH); 6,87-6,99 (m, 3H, CH)
13C-NMR (DMSO-d6) δ [ppm] = 21,3 (CH3); 114,3 (d); 117,5 (d); 119,4; 128,2 (d); 137,3; 143,4
31P-NMR (DMSO-d6): δ [ppm] = 11,6 (m)
In a 100 ml flask with reflux condenser and drying tube 14.3 g (0.1 mol) of o-toluidine hydrochloride and 15.3 g (0.1 mol) of phosphoryl chloride are suspended in 50 ml of toluene and heated with stirring for 4 h to boiling , After cooling, the solvent is removed from the resulting solution in vacuo and the residue washed with petroleum ether. The remaining oil is added without further purification 50 ml of chloroform and added dropwise with exclusion of moisture at -50 to -30 ° C with stirring to a solution of about 70 ml of liquid ammonia in 100 ml of chloroform. Subsequently, the excess ammonia is allowed to evaporate overnight at room temperature. The ammonium chloride-containing crude product is filtered off with suction and, to remove the ammonium chloride, either boiled with diethylamine in chloroform or washed with a little water. This gives 9.1 g (49%) of N - (3-methylphenyl) phosphoric triamide.
Melting point: 159 - 162 ° C
1 H-NMR (DMSO-d 6 ): δ [ppm] = 2.18 (s, 3 H, CH 3 ); 3.9 (d, 4H, NH 2 ); 6.52 (d, 1H, NH); 6.81 (d, 1 H, CH); 6.87-6.99 (m, 3H, CH)
13 C-NMR (DMSO-d 6 ) δ [ppm] = 21.3 (CH 3 ); 114.3 (d); 117.5 (d); 119.4; 128.2 (d); 137.3; 143.4
31 P-NMR (DMSO-d 6 ): δ [ppm] = 11.6 (m)

Beispiel 3Example 3 N-(4-Methyl-2-nitrophenyl)phosphorsäuretriamid N- (4-methyl-2-nitrophenyl) phosphoric triamide

In einem 200 ml Kolben mit Rückflusskühler und Trockenrohr werden 11,3 g (0,06 mol) 4-Methyl-2-nitroanilin-Hydrochlorid in 100 ml Phosphorylchlorid suspendiert und unter Rühren 4 h zum Sieden erhitzt. Anschließend verfährt man analog zu Beispiel 2. Man erhält 4,9 g (35 %) N-(4-Methyl-2-nitrophenyl)phosphorsäuretriamid.
Schmelzpunkt: > 180 °C (Zers.)
1H-NMR (DMSO-d6): δ [ppm] = 2,28 (s, 3 H, CH3); 4,50 (d, 4 H, NH2); 7,43 (d, 1 H, CH); 7,84 (d, 1 H, CH); 7,91 (s, 1 H, CH); 8,25 (d, 1 H, NH)
13C-NMR (DMSO-d6): δ [ppm] = 19,2 (CH3); 119,5; 124,3; 127,8; 133,2 (d); 136,5; 138,2 (d)
31P-NMR (DMSO-d6): δ [ppm] = 8,9
In a 200 ml flask with reflux condenser and drying tube 11.3 g (0.06 mol) of 4-methyl-2-nitroaniline hydrochloride are suspended in 100 ml of phosphoryl chloride and heated with stirring for 4 h to boiling. The procedure is analogous to Example 2. 4.9 g (35%) of N- (4-methyl-2-nitrophenyl) phosphoric triamide are obtained.
Melting point:> 180 ° C (decomp.)
1 H-NMR (DMSO-d 6 ): δ [ppm] = 2.28 (s, 3 H, CH 3 ); 4.50 (d, 4H, NH 2 ); 7.43 (d, 1 H, CH); 7.84 (d, 1H, CH); 7.91 (s, 1H, CH); 8.25 (d, 1H, NH)
13 C-NMR (DMSO-d 6 ): δ [ppm] = 19.2 (CH 3 ); 119.5; 124.3; 127.8; 133.2 (d); 136.5; 138.2 (d)
31 P-NMR (DMSO-d 6 ): δ [ppm] = 8.9

Beispiel 4Example 4 Prüfung auf ureasehemmende WirkungTest for urease-inhibiting effect

30 g auf 40 % der maximalen Wasserkapazität eingestellter Boden werden mit 1 ml Harnstofflösung entsprechend 50 mg Harnstoff versetzt. Gleichzeitig erfolgt die Applikation des Wirkstoffes, vorzugsweise in der Harnstofflösung gelöst. Die Konzentrationsangaben für die einzelnen geprüften Wirkstoffe in der nachfolgenden Tabelle beziehen sich auf die im Test verwendete Menge an Carbamidstickstoff. Der Boden, auf dessen Oberfläche die Harnstofflösung (mit und ohne Wirkstoff) aufgebracht wird, befindet sich in einem luftdicht verschlossenen Gefäß, in das gleichzeitig eine Vorlage eingebracht wird, die den aus dem Harnstoff freigesetzte Ammoniak als Ammonium auffängt. Durch tägliches Überspülen der Vorlage und Analyse der enthaltenen NH4-N-Mengen wird die NH3-N-Freisetzung aus dem Harnstoff bestimmt.30 g of soil adjusted to 40% of the maximum water capacity are mixed with 1 ml of urea solution corresponding to 50 mg of urea. At the same time the application of the active ingredient, preferably dissolved in the urea solution. The concentration data for the individual tested active substances in the table below relate to the amount of carbamide nitrogen used in the test. The floor, on the surface of the urea solution (with and without active ingredient) is applied, located in an airtight container, in the same time an original is introduced, which captures the liberated from the urea ammonia as ammonium. By daily rinsing the template and analyzing the NH 4 -N levels contained, the NH 3 -N release from the urea is determined.

Aus der Summation der Ammonium-Mengen in der Vorlage wird die prozentuale Hemmung der Harnstoff-Hydrolyse in Abhängigkeit von der Zeit berechnet bzw. aus diesen Werten der t50-Wert rechnerisch ermittelt.From the summation of the ammonium amounts in the template, the percentage inhibition of the urea hydrolysis is calculated as a function of time or calculated from these values of the t 50 value.

Als t50-Wert wird der Zeitpunkt in Tagen nach Versuchsbeginn verstanden, zu dem die Hemmung der Harnstoff-Hydrolyse noch 50 % beträgt.The t 50 value is the time in days after the start of the experiment at which the inhibition of urea hydrolysis is still 50%.

Tabelle 1 gibt einen Überblick über die nach dieser Methode ermittelten Hemmdaten einiger ausgewählter erfindungsgemäßer Verbindungen. Tabelle 1: Ureasehemmung (t50-Wert) nach Tagen durch N-Phenylphosphorsäuretriamide der allgemeinen Formel (I)

Figure imgb0013
Verbindung Nr. Konz.a)
%HS-N-bez.
t50-Wert
(d)
1 R1= NO2; R2, R3, R4, R5 = H 0,05 >25b) 2* R2 = CH3; R1, R3, R4, R5 = H 0,5 11,2
a) Konz. % HS-N-bez.: Konzentration in Prozent bezogen auf die verwendete Menge an Harnstoffstickstoff
b) nach 25 Tagen noch 70 % Hemmung
*Vergleichsbeispiel
Table 1 gives an overview of the inhibition data of some selected compounds of the invention determined by this method. Table 1: Urease inhibition (t <sub> 50 </ sub> value) after days by <i> N - </ i> phenylphosphoric triamides of the general formula (I)
Figure imgb0013
Connection no. Conc. A)
% HS-N-mar.
t 50 value
(D)
1 R 1 = NO 2 ; R 2 , R 3 , R 4 , R 5 = H 0.05 > 25 b) 2 * R 2 = CH 3 ; R 1 , R 3 , R 4 , R 5 = H 0.5 11.2
a) conc.% HS-N-mar.: concentration in percent relative to the amount of urea nitrogen used
b) 70% inhibition after 25 days
* Comparative Example

Claims (18)

  1. N-(2-nitrophenyl)phosphoric acid triamides with the general formula (I):
    Figure imgb0025
    wherein:
    X = oxygen or sulphur
    R1, R2, R3, R4 = independently of one another, mean hydrogen, C1-C8-alkyl/heteroalkyl, C2-C8-alkenyl/heteroalkenyl, C2-C8-alkinyl/heteroalkinyl, C3-C8-cycloalkyl/heterocycloalkyl, C3-C8-cycloalkenyl/heterocycloalkenyl, C6-C10-aryl/C5-C10-heterdaryl, aralkyl, heteroarylalkyl, alkaryl, alkheteroaryl, alkoxy, aryloxy, hetaryloxy, alkylthio, arylthio, hetarylthio, acyl, aroyl, hetaroyl, acyloxy, aroyloxy, hetaroyloxy, alkoxycarbonyl, aryloxycarbonyl, hetaryloxycarbonyl, alkylsulfonyl, fluorine, chlorine, bromine, iodine, cyano, nitro, sulfo, carbonyl, carboxy, carbamoyl, sulfamoyl,
    it being possible for two adjacent moieties R to be linked to one another by means of an alkylene or alkenylene chain such as to form a 5-6-limbed, possibly aromatic ring system which if appropriate can contain one or more heteroatoms such as oxygen, nitrogen or sulphur,
    it being possible, if appropriate, to substitute the moieties R1-R4, themselves and independently of one another, for one or more of the aforementioned groups and by amino, alkylamino, dialkylamino, hydroxy, mercapto,
    and salts, tautomers and metal complexes of compounds with the general formula (I) which have a urease-inhibiting effect.
  2. The N-(2-nitrophenyl)phosphoric acid triamide according to Claim 1, in formula (I) X = O and R1 = R2 = R3 = R4 = H.
  3. A process for the production of the N-(2-nitrophenyl)phosphoric acid triamides according to either Claim 1 or 2, characterised in that
    a1) one converts 2-nitroanilines or the hydrochlorides of the latter with phosphoryl chloride POCl3) or thiphosphoryl chloride (PSCl3), if appropriate in the presence of an organic solvent and a tertiary base, at temperatures of 0 to 150°C, optionally in an inert gas atmosphere, in accordance with equation (1) into type (A) N-(2-nitrophenyl)phosphoric acid amide chlorides, it also alternatively being possible to obtain compounds (A) with X = S by sulphurisation of the corresponding oxygen derivatives,
    Figure imgb0026
    or
    a2) one allows phosphorpentachloride (PCl5) to react with a 2-nitroaniline in an approximately equimolar ratio, optionally in an inert organic solvent, and optionally in an inert gas atmosphere at 0 to 150° C in accordance with equation (2) such as to form type (B) compounds which, optionally without any further isolation, are converted with an approximately equimolar quantity of formic acid or water into type (A) N-(2-nitrophenyl)phosphoric acid amide dichlorides, it being possible to obtain compounds (A) with X = S by sulfurisation of the corresponding oxygen derivatives,
    Figure imgb0027
    and then
    b) one allows the type (A) compounds formed in step a1) or a2) to react with ammonia, optionally in an inert organic solvent, at temperatures of - 80 to 30°C in accordance with equation (3) to form the desired end product:
    Figure imgb0028
  4. A composition, characterised in that it contains at least one N-(2-nitrophenyl)phosphoric acid triamide according to either of Claims 1 or 2 in a quantity sufficient to inhibit urease and optionally agriculturally and/or phsyiologically acceptable or compatible or desired carrier means, extenders or thinning agents, additives and optionally further active agents.
  5. The composition according to Claim 4, characterised in that as a further active agent at least one nitrification inhibitor is included in a quantity effective for nitrification inhibition.
  6. The composition according to Claim 5, characterised in that the nitrification inhibitor is selected from one or more of the following compounds:
    a) pyrazole derivatives with the general formula (IV), or salts or complex compounds of the latter:
    Figure imgb0029
    wherein
    R7, R8, R9 mean, independently of one another, hydrogen, halogen, C1-C8-alkyl, or C3-C8-cycloalkyl
    and
    A means the moiety H
    or the moiety
    Figure imgb0030
    with Y = H, Na, K, NH4
    or the moiety
    -CH2-B with B = (di)alkylamino,
    Figure imgb0031
    or the moiety
    Figure imgb0032
    with R10, R11 = H
    or Cl and
    R12 = H or
    Figure imgb0033
    with Z = C1-C8-alkoxy, C1-C8-alkylamino, C6-C10-arylamino
    or the moiety
    Figure imgb0034
    with R13, R14 = H, C1-C8-alkyl, C7-C18-alkylaryl, C6-C10-aryl or the moieties
    Figure imgb0035
    with R15 = C1-C20-alkyl, C3-C8-cycloalkyl, C6-C10-aryl or alkylaryl from C1-C4-alkyl and C6-C10-aryl groups: with X = oxygen or sulphur or with R16 = C1-C4-alkyl, C3-C8-cycloalkyl, C6-C10-aryl or H,
    and the alkyl and aryl moieties listed can be substituted with themselves or with C1-C4-alkylsulfonyl, C1-C4-alkoxy, C1-C4-acyl, halogen, hydroxyl, trimethylsilyl, amino, nitro, sulfo, cyano, carbonyl, carboxyl or C1-C5-carboxylalkyl,
    b) 1H-1,2,4-triazoles or salts or complex compounds of the latter,
    c) dicyandiamide.
  7. A fertiliser composition, characterised in that it contains at least one urea-based, mineral and/or organic fertiliser and at least one N-(2-nitrophenyl)phosphoric acid triamide according to either of Claims 1 or 2 and/or a composition according to any of Claims 4 to 6 or at least one N-(2-nitrophenyl)phosphoric acid triamide according to either of Claims 1 or 2 and at least one nitrification inhibitor defined in Claim 6 respectively in a quantity sufficient to inhibit urease or to inhibit nitrification.
  8. The fertiliser composition according to Claim 7, characterised in that at least one N-(2-nitrophenyl)phosphoric acid triamide according to either of Claims 1 or 2 is included in a quantity of 0.001 to 10 % by weight in relation to the weight of the urea-based fertiliser.
  9. The fertiliser composition according to Claim 7, characterised in that at least one of the nitrification inhibitors defined in Claim 6 is included in a quantity of 0.01 to 10 % by weight in relation to the weight of the urea-based fertiliser.
  10. Use of the N-(2-nitrophenyl)phosphoric acid triamides according to either of Claims 1 or 2 or of the compositions according to any of Claims 4 to 6 for the extra-corporeal regulation or inhibition of the urease-catalysed urea hydrolysis.
  11. Use of the N-(2-nitrophenyl)phosphoric acid triamides according to either of Claims 1 or 2 or of the compositions according to any of Claims 4 to 6 in order to reduce nitrogen losses when fertilising with fertilising urea or urea-based fertilisers.
  12. Use of the N-(2-nitrophenyl)phosphoric acid triamides according to any of Claims 1 or 2 or of the compositions according to any of Claims 4 to 6 in order to reduce the ammonia contamination from the manure or from the animal excrement in animal sheds.
  13. Use of N-(2-nitrophenyl)phosphoric acid triamides according to either of Claims 1 or 2 or of the compositions according to any of Claims 4 to 6 in order to avoid toxic effects when feeding feed urea within the framework of animal food.
  14. Use of N-(2-nitrophenyl)phosphoric acid triamides according to either of Claims 1 or 2 or of the aqueous solutions or liquid formulations of the latter in order to stabilise urea-based fertilisers already produced or still to be produced by downstream or upstream application.
  15. Use of the compositions according to any of Claims 4 to 6 for fertigation.
  16. Use of N-(2-nitrophenyl)phosphoric acid triamides according to any of Claims 1 or 2 or of the composition according to Claim 4 in order to produce a drug for the prophylaxis or therapy of problems or diseases which were induced or promoted directly or indirectly by urease activity.
  17. The use according to Claim 16, the problem or disease being selected from catheter incrustation, inflammatory and ulcerous gastric and intestinal diseases, urolithiasis, pyelonephritis, nephrolithiasis, ammonia encephalopathy, hepatic encephalopathy, hepatic coma, infections of the urinary passage and gastrointestinal infections.
  18. The use according to Claim 17, the gastrointestinal infection being caused by Helicobacter pylori.
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ATE438652T1 (en) 2009-08-15
US7855189B2 (en) 2010-12-21
CA2573543A1 (en) 2006-02-02
CN1989144A (en) 2007-06-27
ES2332099T3 (en) 2010-01-26
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WO2006010389A1 (en) 2006-02-02
US20080070871A1 (en) 2008-03-20
AU2005266693B2 (en) 2009-01-29
NZ552812A (en) 2009-04-30
EP1771458A1 (en) 2007-04-11
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AU2005266693A1 (en) 2006-02-02
BRPI0512103A (en) 2008-02-06
JP4954070B2 (en) 2012-06-13
CA2573543C (en) 2013-04-09
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UA89050C2 (en) 2009-12-25
BRPI0512103B1 (en) 2019-01-08

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